Originally posted by Inland RV Center, In
The typical rubber roof coatings, at least most of them in the past have created a problem that most owners are very unhappy about.
When moisture gets on the coated roof, and runs off, it seems to cause stains on the sides.
The white roofs that Airstream now uses, is prefinished metal.
I used Kool-Seal, a white elastometric roof coating, which is white. I have had no problems with streaking, but my trailer is painted white anyway...
It has helped keep the trailer cooler in the sun, as well as covering some spots that were bare metal.